An elderly woman who disappeared four days ago was reunited early today with her son after an eagle-eyed medic recognized her picture in The Post’s NYPD Daily Blotter yesterday.

Esther Henry, 77, who suffers from Alzheimer’s, disappeared Thursday after she had spent the day at the Park Slope Geriatric Center.

She is the mom of Val Henry, the chief-of-staff of Brooklyn Congressman Edolphus Towns.

Esther Henry vanished when a new driver for the center who was supposed to take her home mistakenly dropped her at Linden Boulevard and East 46th Street in East Flatbush, said Ruth Morrison, the congressman’s spokeswoman.

“An EMS driver picked her up because someone saw her disoriented on the street and took her to Coney Island Hospital on Friday,” she said.

“He saw [The Post] story and realized she was the same woman.”

Val Henry said, “We owe a debt of gratitude to the EMS worker who had the presence of mind to remember her when he read the article in The Post. The whole family is ecstatic.”

His mom had been registered at the hospital under her first and middle names only.